Florence prison inmate kills himself in his cell

An inmate serving 21 months for resisting arrest was found dead from an apparent suicide in his cell Sunday at Arizona's Florence state prison, Arizona Department of Corrections officials said.

At the time of his death, Nelson Johnson, 31, was being held in maximum security in the prison's Kasson unit, which includes mental-health and disciplinary detention cells. Officials couldn't immediately confirm that Johnson was being held in isolation, but all the cells in Kasson are isolation cells.

Johnson is the fifth acknowledged suicide in the state prison system since Jan. 1. All but one of the suicides have been by inmates being held in isolation in maximum security at Florence or Eyman state prisons. There have been four other deaths since the beginning of March in which the department has not released a cause of death and that officials said remain under investigation.